Pickup mechanism

Abstract

A pickup mechanism includes a main frame, a supporting element mounted to the main frame, and a pickup module positioned in the main frame and including a pickup arm, a transmitting element, a separation element, a pickup element and a barrel element. The separation element includes a separation shaft and a separation roller. The pickup element includes a pickup shaft and a pickup roller. The separation roller and the pickup roller are restricted in the pickup arm. The transmitting element links the separation shaft and the pickup shaft. The pickup arm is pivoted at the separation shaft. The barrel element has a base portion pivotally mounted around the pickup shaft, and a stopping block. When the pickup module swings upward or downward, the barrel element is driven to rotate along with the pickup shaft to make the stopping block against the supporting element or apart from the supporting element.

What is claimed is: 
     
       1. A pickup mechanism, comprising:
 a main frame; 
 a supporting element mounted to the main frame; and 
 a pickup module positioned in the main frame, and including a pickup arm, a transmitting element, a separation element, a pickup element and a barrel element, the separation element including a separation shaft and a separation roller mounted around the separation shaft, the pickup element including a pickup shaft and a pickup roller mounted around the pickup shaft, the separation roller and the pickup roller being restricted in the pickup arm, the transmitting element linking the separation shaft and the pickup shaft, the pickup arm pivoted at the separation shaft to swing the pickup module upward or downward under a drive of a power source, the barrel element having a barrel-shaped base portion pivotally mounted around the pickup shaft of the pickup element, a side of the base portion extending outward to form a stopping block, 
 wherein when the pickup module swings upward or downward under the drive of the power source, the barrel element is also driven to rotate along with the pickup shaft so as to make the stopping block against the supporting element or apart from the supporting element. 
 
     
     
       2. The pickup mechanism as claimed in  claim 1 , wherein the barrel element rotates along with the pickup shaft by a friction between the barrel element and the pickup shaft. 
     
     
       3. The pickup mechanism as claimed in  claim 2 , wherein an inside of the base portion of the barrel element defines the elastic arm, a periphery of one end of the pickup shaft of the pickup element is concaved inward to form a ring-shaped sliding groove, a free end of the elastic arm protrudes inward to form a sliding block resisting in the sliding groove by an elastic force of the elastic arm to generate the friction. 
     
     
       4. The pickup mechanism as claimed in  claim 1 , further comprising a stopper element which is set on the main frame and located between the separation element and the pickup element, the stopper element having a blocking portion for blocking papers entering an inside of the pickup mechanism. 
     
     
       5. The pickup mechanism as claimed in  claim 1 , wherein the supporting element has a supporting portion, the stopping block can be sustained by the supporting portion for supporting the pickup module when the pickup arm is raised up. 
     
     
       6. The pickup mechanism as claimed in  claim 1 , wherein the separation roller and the pickup roller are made of a material with a high friction coefficient, such as rubber. 
     
     
       7. The pickup mechanism as claimed in  claim 1 , wherein the transmitting element is a belt or a gear chain.